Roads & Bridges
Tough Ground Conditions on Germany Autobahn
The expansion and new construction of the German highway network is particularly important in view of eliminating traffic bottlenecks and opening up, or rather connecting, structurally weak regions – eventually, economic growth also means traffic and mobility growth.
Several new road sections are currently under construction, including part of the federal highway A72 in the district of Leipzig, where BAUER Spezialtiefbau GmbH is also involved in a joint venture with four Bauer rotary drilling rigs being used.
Since August 2013, traffic has been flowing on the A72 by 2-lanes from Vogtland in Bavaria, via Chemnitz, to Borna and then in four lanes all the way to Leipzig.
The earthworks and superstructure on the almost ten kilometre long latest section began in October 2015.
The planned highway section first passes over a former mining area dating from the coal production era and, later, along opencast mine pit embankments, which is why the ground must be compacted and its load-bearing capacity improved.
Bauer is constructing a total of around 226,000 meters of vibro stone columns with lengths of up to 15 metres for this.
In addition, there will be around 28,000 meters of replacement borings with re-compaction using the deep vibration methods down to a depth of 26 meters. Up to four rotary drilling rigs from BAUER Maschinen GmbH are being used for this.
The new construction of the federal highway A72 between Chemnitz and Leipzig, which totals 62 kilometres, is the last gap to close in the Saxony’s highway network and is pioneering for the entire central-German economic region.
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